Printer&#39;s registering device



April 30, 1929. T, s PSO 1,711,212

PRINTERS REGISTERING DEVICE Filed Dec. 14; 1925 IN V EN TOR.

A TTORNEYS Patented Apr. 30, 1929.

burrs-e STAT-ES PATENT oF IcE.

HAROLD 'I. SIMPSON, OF CINCINNATI, OHIO, ASSIG-NOR TO PRINTING MACHINERY COMI'PANY, F CINCINNATI, OHIO, A CORPOEATIGN OF OHIO.

PRINTERS REGISTERING DEVICE.

- Application filed Deeember 14, 1925. Srial'No. 75,267.

My invention relates to improvements in the general class of printers registering devices and particularly to clamps for use with foundation plates having grooves in which the clamps may be moved into operative clamping-position.

It is my object to provide improvements in structure in these types of clamping devices which will enable the manufacture of clamping devices with Very narrow jaws, but which are notwithstanding rugged and have no tendency to break off at the neck. I have illustrated my invention in the form of an improvement in the plate clamp as. described in the VVarnock Patent No. 1,007,164, of Gotober 31, 1911. Reference is hereby made to this type of clamp, and as will be hereinafter described, my invention specifically relates to improvements in the clamping devices operating on a similar principle, which avoids the tendency for the aws to break off at the neck, particularly where narrow ws are needed.

The clamp referred to is composed of a spacer for a grooved foundation plate or bed for printing plates and comprises a body portion adapted to be passed down at any place into a groove, a transverse jaw coming above the foundation plate, and adapted to come between printing plates and to engage adjacent edges of two plates, and spring actuated devices separate from, and mounted on the body portion and coming directly beneath the printing plate, engaged at each side of the jaw, and adapted to automatically engage projecting ledges of the groove to hold the spacer to the foundation plate and automatically prevent accidental separation.

The transverse jaws of spacers made in ac.- cordance with the Warnock disclosure in the above noted patent tend to breakoff, and it is to the prevention of this weakness that my in vention is directed.

Referring to the drawing in which I have illustrated a preferred type of improved structure Figure 1 is a side elevation of my improved spacer clamp.

Figure 2 is an end elevation of the clamp.

Figure 3 is a top plan view of the structure shown in Figures 1 and 2.

Figure at is a vertical sectional view of the spacer clamp in operative position within a grooved foundation plate.

' Figure 5 is a section along the lines 55 in Figure 4.

Referring first to Figure 4 I have illustrat ed a foundation or bed plate 1 having grooves as-indicated at 2 extending across it. Most foundation plates have similar grooves di agonally disposed in them. Back bars such as the one indicated at 3 are set in the bottom along the side edges of the groove and may be suitably secured within the groove with pins as indicated at 1 which extend into apertures in thefoundation plate. The clamping member 'in which I have made improvements is formed with a. body portion 6 with two pinions 7 mounted in the base thereof. The pinions are mounted on the ends of a square portion of a shaft 8 which square portion also carries a worm wheel 9 between the gears meshing with a vertically disposed worm shaft 10 provided with a vertical key receiving socket 11. l Jith the engagement of the pinions in the racks, the device may be moved. along in the groove of the foundation plate with the rotation of the worm shaft by means of a key 13. The clamping jaw 14 extends above the groove and is disposed in transverse position with relation to the groove. The clamping jaw has a peripherally grooved portion 14: the jaw being held to the body while free to rotate by pins 15. This permit-s the entire device with the clamping jaw to be moved into desired position with relation to printing plates one of which is indicated at 16. The worm shaft is j ournaled at its bottom. end on a journal extending up from the body of the clamp, which journal may be in the form of an adjustment screw 17 for taking up any lost motion of the worm shaft.

Thus far the description of parts is entirely in accordance with the ar-nook disclosure but as previously suggested the neck of the clamping jaw tended to break off with the strain of repeated use. In my improved structure as indicated in all the figures I have provided a peripheral groove 18 in the body of the clamping device which groove seats a peripheral flange 19 which is formed in the neck of the clamping jaw. The sides of this flange extend within and bear against the side walls of the groove so that torsion strains on the jaw are taken up in the size bearing of the flange and the side walls of the groove without falling on the thin neck which connects the outer part of the aw with the base thereof.

In the illustration I have shown spring clips extending about the body of the jaw which clips are adapted to retain the body below flanged top edges 21 of the side walls of the groove in the foundation plate. While I have referred to a grooved foundation plate it should also be understood that transverse grooves may be provided by building up from the actual foundation plate with blocks the upper surfaces of which are disposed so as to lie in a Hat plane.

It should be noted that am able with my novel structure to provide for a very thin jaw member which is of great iniportance in certain types of set-up work. While l have disclosed a structure which is a specific improvement on one type of clamp only, it should further be noted that the prov'sion of a jaw member adaoted to extend from a grooved foundation plate, which jaw member has a flange the side edges of which form a vertical. bearing against the outer wall of a recessed aperture in the clamp body which carries the jaw, in addition to the horizontal bearing of the meeting faces, is new and with slight mechanical change is adapted for use with any clamp Whichhas a body from which a clamping jaw is extended.

Having thus described my invention What I claim as i ew and desire to secure by Letters Patent, is

A printing plate holding device composed of a carrier adapted to be moved within a' groove in a foundation plate, and a freely rotatable clai'nping aw member extending from within said carrier member, said member having a clamping portion extending above the plane of the top surface of the foundation plate, said clampingjaw provided with an enlarged neck portion having a peripheral flange, said carrier member having an enlarged recessed aperture with a peripheral flange providing a thrust bearing for the peripheral flange of said jaw, and annular walls of. said enlarged recessed aperture providing a bearing for the enlarged neck of said jaw.

HAROLD T. SIMPSON. 

